Co(II, III) Hydroxides Supported on Zeolite Acting as an Efficient and Robust Catalyst for Catalytic Water Oxidation with Ru(bpy)33+
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Конференция |
4th International Symposium on the Catalysis for Clean Energy and Sustainable Chemistry
09-11 июл. 2018
,
Bilbao
|
| Журнал |
Topics in Catalysis
ISSN: 1022-5528
, E-ISSN: 1572-9028
|
| Вых. Данные |
Год: 2019,
Том: 62,
Номер: 5-6,
Страницы: 439-455
Страниц
: 17
DOI:
10.1007/s11244-019-01158-1
|
| Ключевые слова |
Water splitting One-electron oxidants Cobalt hydroxides Zeolite Oxygen evolution reaction |
| Авторы |
Yashnik Svetlana A.
1
,
Chikunov Andrey S.
1
,
Taran Oxana P.
1,2,3
,
Salnikov Anton V.
1
,
Parmon Valentin N.
1
|
| Организации |
| 1 |
Boreskov Institute of Catalysis SB RAS Novosibirsk Russia
|
| 2 |
Institute of Chemistry and Chemical Technology SB RAS, FRC Krasnoyarsk Science Center SB RAS Krasnoyarsk Russia
|
| 3 |
Siberian Federal University Krasnoyarsk Russia
|
|
Информация о финансировании (2)
|
1
|
Федеральное агентство научных организаций России
|
0303-2016-0014
|
|
2
|
Федеральное агентство научных организаций России
|
0356-2016-0503
|
A novel highly efficient and stable for many cycles catalyst (1% Со-ZSM-5(17)) for water oxidation was developed using the method of polycondensation for stabilization of oxo/hydroxo complexes of cobalt (II, III) and nanosize Co3O4 in zeolite channels. In a weak-alkaline medium (pH 8.0, 9.2, 10.0) in the presence of a one-electron oxidant (Ru(bpy)33+), the catalyst provided the yield of oxygen as high as 56, 73 и 78% of the stoichiometric quantity, respectively. Catalysts based on ZSM-5 zeolite exhibited higher catalytic activity as compared to the catalysts based on the MOR, BEA, Y. Inspection of the electron states of cobalt in the Co-containing zeolite-based catalysts using TPR-H2 and UV–Vis DR techniques revealed that α-Co(OH)2-like polynuclear clusters and hydrocomplexes stabilized in the zeolite channels were most active to catalytic oxidation of water, while their transformation to Co3O4-like clusters/nanoparticles and Co2+ oxocomplexes, respectively, during thermal treatment led to some decrease in the catalyst efficiency. Coarsening of Co3O4-like clusters/nanoparticles caused the further decrease in the system efficiency. The minimal activity was observed with the catalysts containing predominantly isolated Co2 +Oh ions. The result obtained indicates a kind of at least polynuclear structure of the catalytically active center ConOx, where n > 2.